Jean piel



(No Model.)

J.PIEL. TELEPHONE SYSTEM.

No. 563,614. Patented July 7, 1896. Q

XC/WM J? ww UNITED STATES PATENT Fries,

JEAN PIEL, OF NEIV YORK, N. Y., ASSIGNOR TO FREDERICK PEARCE, OF

- SAME PLACE.

TELEPHONE SYSTEM.

SPECIFICATION forming part of LettersPatent No. 563,614, dated July '7, 1896. Application filed Apn'l 13, 1896. Serial No. 587,244] (No model.)

To 02% whom it may concern.-

Be it known that I, J EAN PIEL, a subject of the Emperor of Germany, residing at New York, in the county and State of New York, have invented a new and useful Improvement in Telephone Systems, of which the following is a specification.

This invention consists in introducing into the main line the secondary of an inductioncoil, the telephone-receiver and the call-bell in series and in combination therewith, a switch and wires therefrom to the main line for shunting either the secondary of the induction'coil and the telephone-receiver when the switch is in the position of rest, the line being thus prepared for call, or the call-bell when the switch is moved to the other position, thus preparing the line for talking service.

In the drawings, Figure 1 is a diagram of the parts in my improved system in the position preparatory to sending a call by sounding the hell or by operating another signaling device, and Fig. 2 is a similar diagram with the parts in the position for speaking over the line.

The main line is represented at a and CL, the key of ordinary or usual construction at I), and-c represents the secondary and c the primary of an induction-coil. The telephonereceiver is represented at d, and the call-bell at 6. These parts are also of usual and wellknown construction. The key I), the secondary c of the induction-coil, the telephonereceiver (Z, and the call-bell e are all in the main line.

f represents a current-gen erator, which may either be a magneto-generator or a battery. The switch is provided with adjacent contacts 1 2 3 4:.

9 represents an insulated metallic piece upon the switch g g to engage the adjacent contacts 2 and 3 or 3 and at, and wires 5 6 7 extend from these contacts to the main line in the manner shown.

it represents a circuit which includes the primary 0' of the inductioneoihthe telephonetransmitter i, and the battery it, and one end of the circuit it connects with the contact 1 and the other with the switch 9 g.

Referring now to Fig. 1, a call comes over the main line from a distant instrument and passes chiefly along the path of least resistance from the main wire a by the wire 5 to the contact 2, by the metallic piece g" to the contact 3, by wire 6 through the call-bell to the main wire of. The call is sent in at the distant station'in the well-known manner by pressing the key I) and thus bringing the generator f into the line. After the call has been given, and to bring the parts into the proper relation for speaking, the switch g g is moved from the position shown in Fig. 1 to the position shown in Fig. 2, and the shunt 5 2 3 6, around the secondary of the induction-coil and the telephone-receiver, is taken off and the shunt 6 3 4: 7 is put on around the callbell, so that an electric current coming over the main line afrom a distant station passes through the secondary c of the induction-coil, through the telephone-receiver cl, and chiefly by the wire 6, contact 3, piece g, contact 4, and wire 7 to the main wire a. In this position of the parts the telephone-receiver d will reproduce the message from the distant station, and the closing of the primary 0 of the induction-coil through 71, i, k, h, g, g, and contact 1 will, allow of sending a message to the distant station. The parts are brought to their normal position by moving the switch back into the position shown in Fig. 1.

I claim as my invention- In a telephone system, the combination with the secondary of an induction-coil, the receiver and the call-be1l or other signaling instrument in the main line, of a switch and wires therefrom to the main line for shunting either the secondary of the induction-coil and the receiver or the call-bell or other signaling instrument, according to the position of the switch, substantially as set forth.

Signed by me this 9th day of April, 1896.

JEAN PIEL.

\Vitnesses:

Geo. T. PINCKNEY, S. T. HAVILAND. 

